KgAudioScene Namespace Reference

Typedefs
typedef QFlags< Capability >	Capabilities

Enumerations
enum	Capability { SupportsLowLatencyPlayback = 1 << 0, SupportsPositionalPlayback = 1 << 1 }

Functions
Capabilities	capabilities ()
bool	hasError ()
QPointF	listenerPos ()
void	setListenerPos (const QPointF &pos)
void	setVolume (qreal volume)
qreal	volume ()

Detailed Description

This class exposes general properties of the audio playback context. Actual sounds are represented in this context by KgSound instances.

The audio scene basically consists of a listener. The position of this listener is relevant when sounds are played at certain positions: The audio channels will then be balanced to make the sound appear to come from that direction.

Because there can ogly be one listener, all methods in this class are static.

Warning

Not all functionally exposed by the API of this class is guaranteed to be available on the compiled KgAudio backend. Check KgAudioScene::capabilities() if in doubt.

Enumeration Type Documentation

Capability

enum KgAudioScene::Capability

This enumeration represents capabilities which may not be provided by every KgAudio backend.

Enumerator
SupportsLowLatencyPlayback	Playback starts as soon as KgSound::start is called.

Definition at line 36 of file audio/kgaudioscene.h.

Function Documentation

capabilities()

KgAudioScene::Capabilities KgAudioScene::capabilities

(

)

Returns

which capabilities are supported by the compiled KgAudio backend

Definition at line 19 of file kgaudioscene-openal.cpp.

hasError()

bool KgAudioScene::hasError

(

)

Returns

whether an error was detected in the audio backend

Since KgAudio is typically used by games where audio is not an absolutely vital part of the gameplay, we do not need to fail if sound does not work, over even make some sort of deep analysis why something did not work. The user will notice missing sound, and advanced users may investigate the kWarning() messages. That is usually enough. If not, use this method.

The state of hasError() may theoretically change while the application runs, but in practice, this is very unlikely. (The only tricky part is typically the initial allocation of resources.)

See also

KgSound::hasError()

Definition at line 52 of file kgaudioscene-openal.cpp.

listenerPos()

QPointF KgAudioScene::listenerPos

(

)

Returns

the position of the listener

Definition at line 24 of file kgaudioscene-openal.cpp.

setListenerPos()

void KgAudioScene::setListenerPos

(

const QPointF &

pos

)

Sets the position of the listener.

The default is (0.0, 0.0), the point of origin.

Note

Effective only if positional playback is supported.

Definition at line 29 of file kgaudioscene-openal.cpp.

setVolume()

void KgAudioScene::setVolume

(

qreal

volume

)

Sets the master volume for sounds outputted by TagaroAudio.

The default is 1.0, which means no volume change, compared to the original sounds. 0.0 means that all sounds are muted.

Definition at line 43 of file kgaudioscene-openal.cpp.

volume()

qreal KgAudioScene::volume

(

)

Returns

the master volume for sounds outputted by TagaroAudio

Definition at line 38 of file kgaudioscene-openal.cpp.